685 lines
23 KiB
C
685 lines
23 KiB
C
/*
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* mooedit/mooeditcursor.c
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*
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* Copyright (C) 2004-2005 by Yevgen Muntyan <muntyan@math.tamu.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* See COPYING file that comes with this distribution.
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*/
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#define MOOEDIT_COMPILATION
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#include "mooedit/mooedit-private.h"
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#include "mooedit/mootextiter.h"
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#include "mooutils/moocompat.h"
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inline static GtkWidgetClass *parent_class (void)
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{
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static gpointer sourceview_class = NULL;
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if (!sourceview_class)
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sourceview_class = GTK_WIDGET_CLASS (gtk_type_class (GTK_TYPE_SOURCE_VIEW));
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return GTK_WIDGET_CLASS (sourceview_class);
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}
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inline static gboolean is_word_char (const GtkTextIter *iter)
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{
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gunichar c = gtk_text_iter_get_char (iter);
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g_return_val_if_fail (c != 0, FALSE);
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return g_unichar_isalnum (c) || c == '_';
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}
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/* Glib docs say: "(Note: don't use this to do word breaking; you have
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* to use Pango or equivalent to get word breaking right, the algorithm
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* is fairly complex.)"
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*/
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inline static gboolean is_space (const GtkTextIter *iter)
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{
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gunichar c = gtk_text_iter_get_char (iter);
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g_return_val_if_fail (c != 0, FALSE);
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return g_unichar_isspace (c);
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}
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inline static gboolean is_word_start (const GtkTextIter *iter)
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{
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GtkTextIter i;
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if (!is_word_char (iter)) return FALSE;
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i = *iter;
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if (!gtk_text_iter_backward_char (&i)) return TRUE;
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return !is_word_char (&i);
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}
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static gboolean text_iter_forward_word_start (GtkTextIter *iter)
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{
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gboolean moved = FALSE;
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if (gtk_text_iter_is_end (iter)) return FALSE;
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/* if iter points to word char, then go to the first non-space char after the word
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* otherwise, go to the next word char
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* stop at end of line
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*/
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if (is_word_char (iter)) {
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while (!gtk_text_iter_is_end (iter) && is_word_char (iter))
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{
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gtk_text_iter_forward_char (iter);
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moved = TRUE;
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}
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if (gtk_text_iter_is_end (iter)) return FALSE;
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while (!gtk_text_iter_is_end (iter) &&
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is_space (iter) &&
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!gtk_text_iter_ends_line (iter))
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{
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gtk_text_iter_forward_char (iter);
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moved = TRUE;
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}
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}
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else {
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if (gtk_text_iter_ends_line (iter)) {
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gtk_text_iter_forward_char (iter);
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moved = TRUE;
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}
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else {
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while (!gtk_text_iter_is_end (iter) &&
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!is_word_char (iter) &&
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!gtk_text_iter_ends_line (iter))
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{
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gtk_text_iter_forward_char (iter);
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moved = TRUE;
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}
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}
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}
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return moved && !gtk_text_iter_is_end (iter);
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}
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inline static gboolean text_iter_forward_word_start_n (GtkTextIter *iter, guint count)
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{
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if (!count) return FALSE;
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while (count) {
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if (!text_iter_forward_word_start (iter)) {
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gtk_text_iter_forward_to_end (iter);
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return FALSE;
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}
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else
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--count;
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}
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return TRUE;
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}
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inline static gboolean text_iter_backward_word_start (GtkTextIter *iter)
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{
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gboolean moved = FALSE;
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if (gtk_text_iter_starts_line (iter)) {
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moved = gtk_text_iter_backward_char (iter);
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/* it may point now to \n in \r\n combination */
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if (moved && !gtk_text_iter_ends_line (iter))
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gtk_text_iter_backward_char (iter);
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}
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else {
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while (gtk_text_iter_backward_char (iter) &&
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!is_word_start (iter) &&
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!gtk_text_iter_starts_line (iter))
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moved = TRUE;
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}
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return moved;
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}
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inline static gboolean text_iter_backward_word_start_n (GtkTextIter *iter, guint count)
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{
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gboolean moved = FALSE;
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while (count && text_iter_backward_word_start (iter)) {
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moved = TRUE;
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--count;
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}
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return moved;
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}
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/* TODO: may I do this? */
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inline static void text_view_reset_im_context (GtkTextView *text_view)
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{
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if (text_view->need_im_reset)
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{
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text_view->need_im_reset = FALSE;
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gtk_im_context_reset (text_view->im_context);
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}
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}
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void _moo_edit_move_cursor (GtkTextView *text_view,
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GtkMovementStep step,
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gint count,
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gboolean extend_selection)
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{
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GtkTextBuffer *buffer;
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GtkTextIter insert;
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GtkTextIter newplace;
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g_return_if_fail (text_view != NULL);
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if (!text_view->cursor_visible || step != GTK_MOVEMENT_WORDS)
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return GTK_TEXT_VIEW_CLASS (parent_class())->move_cursor (
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text_view, step, count, extend_selection);
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buffer = gtk_text_view_get_buffer (text_view);
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text_view_reset_im_context (text_view);
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gtk_text_buffer_get_iter_at_mark (buffer, &insert,
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gtk_text_buffer_get_mark (buffer,
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"insert"));
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newplace = insert;
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if (count < 0)
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text_iter_backward_word_start_n (&newplace, -count);
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else if (count > 0)
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text_iter_forward_word_start_n (&newplace, count);
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/* call move_cursor() even if the cursor hasn't moved, since it
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cancels the selection
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*/
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/* move_cursor (buf, &newplace, extend_selection); */
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if (extend_selection)
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gtk_text_buffer_move_mark (buffer, gtk_text_buffer_get_insert (buffer),
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&newplace);
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else
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gtk_text_buffer_place_cursor (buffer, &newplace);
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if (!gtk_text_iter_equal (&insert, &newplace))
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{
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gtk_text_view_scroll_mark_onscreen (text_view,
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gtk_text_buffer_get_insert (buffer));
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}
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}
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void _moo_edit_delete_from_cursor (GtkTextView *text_view,
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GtkDeleteType type,
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gint count)
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{
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GtkTextBuffer *buf;
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GtkTextMark *insert_mark;
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GtkTextIter insert, start, end;
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if (type != GTK_DELETE_WORD_ENDS)
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return GTK_TEXT_VIEW_CLASS (parent_class())->delete_from_cursor (text_view, type, count);
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text_view_reset_im_context (text_view);
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buf = gtk_text_view_get_buffer (text_view);
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insert_mark = gtk_text_buffer_get_insert (buf);
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gtk_text_buffer_get_iter_at_mark (buf, &insert, insert_mark);
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start = insert;
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end = insert;
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if (count > 0)
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text_iter_forward_word_start_n (&end, count);
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else if (count < 0)
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text_iter_backward_word_start_n (&start, -count);
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if (!gtk_text_iter_equal (&start, &end))
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{
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gtk_text_buffer_begin_user_action (buf);
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gtk_text_buffer_delete_interactive (buf, &start, &end, text_view->editable);
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gtk_text_buffer_end_user_action (buf);
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gtk_text_view_scroll_mark_onscreen (text_view, insert_mark);
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}
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}
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/****************************************************************************/
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/* Mouse
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*/
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inline static gboolean extend_selection (MooEdit *edit,
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MooEditSelectionType type,
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GtkTextIter *insert,
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GtkTextIter *selection_bound)
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{
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return MOO_EDIT_GET_CLASS(edit)->extend_selection (edit, type, insert, selection_bound);
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}
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inline static void clear_drag_stuff (MooEdit *edit)
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{
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edit->priv->drag_moved = FALSE;
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edit->priv->drag_type = MOO_EDIT_DRAG_NONE;
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edit->priv->drag_start_x = -1;
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edit->priv->drag_start_y = -1;
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edit->priv->drag_button = GDK_BUTTON_RELEASE;
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}
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#define get_buf(edit) \
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GTK_SOURCE_BUFFER (gtk_text_view_get_buffer (GTK_TEXT_VIEW (edit)))
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/* from gtktextview.c */
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inline static void text_view_unobscure_mouse_cursor (GtkTextView *text_view)
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{
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if (text_view->mouse_cursor_obscured)
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{
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GdkCursor *cursor =
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gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (text_view)),
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GDK_XTERM);
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gdk_window_set_cursor (gtk_text_view_get_window (text_view, GTK_TEXT_WINDOW_TEXT), cursor);
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gdk_cursor_unref (cursor);
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text_view->mouse_cursor_obscured = FALSE;
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}
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}
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static void start_drag_scroll (MooEdit *edit);
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static void stop_drag_scroll (MooEdit *edit);
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static gboolean drag_scroll_timeout_func (MooEdit *edit);
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/* from gtktextview.c */
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static void text_view_start_selection_dnd (GtkTextView *text_view,
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const GtkTextIter *iter,
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GdkEventMotion *event);
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static const int SCROLL_TIMEOUT = 100;
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int _moo_edit_button_press_event (GtkWidget *widget,
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GdkEventButton *event)
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{
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GtkTextView *text_view;
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MooEdit *edit;
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GtkTextBuffer *buffer;
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int x, y;
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GtkTextIter iter;
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text_view = GTK_TEXT_VIEW (widget);
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text_view_unobscure_mouse_cursor (text_view);
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if (gtk_text_view_get_window_type (text_view, event->window) != GTK_TEXT_WINDOW_TEXT)
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{
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return FALSE;
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}
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edit = MOO_EDIT (widget);
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buffer = gtk_text_view_get_buffer (text_view);
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gtk_widget_grab_focus (widget);
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text_view_reset_im_context (text_view);
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gtk_text_view_window_to_buffer_coords (text_view, GTK_TEXT_WINDOW_TEXT,
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(int)event->x, (int)event->y, &x, &y);
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gtk_text_view_get_iter_at_location (text_view, &iter, x, y);
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if (event->type == GDK_BUTTON_PRESS)
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{
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if (event->button == 1) {
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GtkTextIter sel_start, sel_end;
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edit->priv->drag_button = GDK_BUTTON_PRESS;
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edit->priv->drag_start_x = x;
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edit->priv->drag_start_y = y;
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/* if clicked in selected, start drag */
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if (gtk_text_buffer_get_selection_bounds (buffer, &sel_start, &sel_end))
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{
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gtk_text_iter_order (&sel_start, &sel_end);
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if (gtk_text_iter_in_range (&iter, &sel_start, &sel_end)) {
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/* clicked inside of selection,
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* set up drag and return */
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edit->priv->drag_type = MOO_EDIT_DRAG_DRAG;
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return TRUE;
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}
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}
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/* otherwise, clear selection, and position cursor at clicked point */
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if (event->state & GDK_SHIFT_MASK)
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gtk_text_buffer_move_mark (buffer,
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gtk_text_buffer_get_insert (buffer),
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&iter);
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else
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gtk_text_buffer_place_cursor (buffer, &iter);
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edit->priv->drag_type = MOO_EDIT_DRAG_SELECT;
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}
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else if (event->button == 2 || event->button == 3) {
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/* let GtkSourceView worry about this */
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return parent_class()->button_press_event (widget, event);
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}
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else {
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g_warning ("got button %d in button_press callback", event->button);
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}
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}
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else if (event->type == GDK_2BUTTON_PRESS && event->button == 1)
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{
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GtkTextIter bound;
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if (gtk_text_buffer_get_selection_bounds (buffer, NULL, NULL))
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{
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/* it may happen sometimes, if you click fast enough */
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gtk_text_buffer_place_cursor (buffer, &iter);
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}
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edit->priv->drag_button = GDK_2BUTTON_PRESS;
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edit->priv->drag_start_x = x;
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edit->priv->drag_start_y = y;
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edit->priv->drag_type = MOO_EDIT_DRAG_SELECT;
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bound = iter;
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if (extend_selection (edit, MOO_EDIT_SELECT_WORDS, &iter, &bound))
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gtk_text_buffer_select_range (buffer, &iter, &bound);
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}
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else if (event->type == GDK_3BUTTON_PRESS && event->button == 1)
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{
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GtkTextIter bound = iter;
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edit->priv->drag_button = GDK_3BUTTON_PRESS;
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edit->priv->drag_start_x = x;
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edit->priv->drag_start_y = y;
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edit->priv->drag_type = MOO_EDIT_DRAG_SELECT;
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if (extend_selection (edit, MOO_EDIT_SELECT_LINES, &iter, &bound))
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gtk_text_buffer_select_range (buffer, &iter, &bound);
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}
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return TRUE;
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}
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int _moo_edit_button_release_event (GtkWidget *widget,
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G_GNUC_UNUSED GdkEventButton *event)
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{
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GtkTextView *text_view = GTK_TEXT_VIEW (widget);
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MooEdit *edit = MOO_EDIT (widget);
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GtkTextIter iter;
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switch (edit->priv->drag_type) {
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case MOO_EDIT_DRAG_NONE:
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/* it may happen after right-click, or clicking outside
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* of widget or something like that
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* everything has been taken care of, so do nothing */
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break;
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case MOO_EDIT_DRAG_SELECT:
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/* everything should be done already in button_press and
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* motion_notify handlers */
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stop_drag_scroll (edit);
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break;
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case MOO_EDIT_DRAG_DRAG:
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/* if we were really dragging, drop it
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* otherwise, it was just a single click in selected text */
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g_assert (!edit->priv->drag_moved); /* parent should handle drag */
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gtk_text_view_get_iter_at_location (text_view, &iter,
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edit->priv->drag_start_x,
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edit->priv->drag_start_y);
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gtk_text_buffer_place_cursor (gtk_text_view_get_buffer (text_view),
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&iter);
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break;
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default:
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g_assert_not_reached ();
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}
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clear_drag_stuff (edit);
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return TRUE;
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}
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#define outside(x,y,rect) \
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((x) < (rect).x || \
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(y) < (rect).y || \
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(x) >= (rect).x + (rect).width || \
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(y) >= (rect).y + (rect).height)
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int _moo_edit_motion_event (GtkWidget *widget,
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GdkEventMotion *event)
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{
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GtkTextView *text_view = GTK_TEXT_VIEW (widget);
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MooEdit *edit = MOO_EDIT (widget);
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int x, y, event_x, event_y;
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GtkTextIter iter;
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text_view_unobscure_mouse_cursor (text_view);
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if (!edit->priv->drag_type) return FALSE;
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if (event->is_hint)
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gdk_window_get_pointer (event->window, &event_x, &event_y, NULL);
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else {
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event_x = (int)event->x;
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event_y = (int)event->y;
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}
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gtk_text_view_window_to_buffer_coords (text_view,
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gtk_text_view_get_window_type (text_view, event->window),
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event_x, event_y, &x, &y);
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gtk_text_view_get_iter_at_location (text_view, &iter, x, y);
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if (edit->priv->drag_type == MOO_EDIT_DRAG_SELECT) {
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GdkRectangle rect;
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GtkTextIter start;
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MooEditSelectionType t;
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GtkTextBuffer *buffer;
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edit->priv->drag_moved = TRUE;
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gtk_text_view_get_visible_rect (text_view, &rect);
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if (outside (x, y, rect)) {
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start_drag_scroll (edit);
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return TRUE;
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}
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else
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stop_drag_scroll (edit);
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buffer = gtk_text_view_get_buffer (text_view);
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gtk_text_view_get_iter_at_location (text_view, &start,
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edit->priv->drag_start_x,
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edit->priv->drag_start_y);
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if (edit->priv->drag_button == GDK_BUTTON_PRESS)
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t = MOO_EDIT_SELECT_CHARS;
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else if (edit->priv->drag_button == GDK_2BUTTON_PRESS)
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t = MOO_EDIT_SELECT_WORDS;
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else
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t = MOO_EDIT_SELECT_LINES;
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if (extend_selection (edit, t, &start, &iter))
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gtk_text_buffer_select_range (buffer, &iter, &start);
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else
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gtk_text_buffer_place_cursor (buffer, &iter);
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}
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else {
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/* this piece is from gtktextview.c */
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int x, y;
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gdk_window_get_pointer (gtk_text_view_get_window (text_view, GTK_TEXT_WINDOW_TEXT),
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&x, &y, NULL);
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if (gtk_drag_check_threshold (widget,
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edit->priv->drag_start_x,
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edit->priv->drag_start_y,
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x, y))
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{
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GtkTextIter iter;
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int buffer_x, buffer_y;
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gtk_text_view_window_to_buffer_coords (text_view,
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GTK_TEXT_WINDOW_TEXT,
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edit->priv->drag_start_x,
|
|
edit->priv->drag_start_y,
|
|
&buffer_x,
|
|
&buffer_y);
|
|
|
|
gtk_text_view_get_iter_at_location (text_view, &iter, buffer_x, buffer_y);
|
|
|
|
edit->priv->drag_type = MOO_EDIT_DRAG_NONE;
|
|
text_view_start_selection_dnd (text_view, &iter, event);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static const GtkTargetEntry gtk_text_view_target_table[] = {
|
|
{ (char*)"GTK_TEXT_BUFFER_CONTENTS", GTK_TARGET_SAME_APP, 0 }
|
|
};
|
|
|
|
static void text_view_start_selection_dnd (GtkTextView *text_view,
|
|
G_GNUC_UNUSED const GtkTextIter *iter,
|
|
GdkEventMotion *event)
|
|
{
|
|
GdkDragContext *context;
|
|
GtkTargetList *target_list;
|
|
|
|
text_view->drag_start_x = -1;
|
|
text_view->drag_start_y = -1;
|
|
text_view->pending_place_cursor_button = 0;
|
|
|
|
target_list = gtk_target_list_new (gtk_text_view_target_table,
|
|
G_N_ELEMENTS (gtk_text_view_target_table));
|
|
gtk_target_list_add_text_targets (target_list, 0);
|
|
|
|
context = gtk_drag_begin (GTK_WIDGET (text_view), target_list,
|
|
(GdkDragAction) (GDK_ACTION_COPY | GDK_ACTION_MOVE),
|
|
1, (GdkEvent*)event);
|
|
|
|
gtk_target_list_unref (target_list);
|
|
|
|
gtk_drag_set_icon_default (context);
|
|
}
|
|
|
|
|
|
inline static int char_class (const GtkTextIter *iter)
|
|
{
|
|
if (gtk_text_iter_ends_line (iter)) return -1;
|
|
else if (is_space (iter)) return 0;
|
|
else if (is_word_char (iter)) return 1;
|
|
else return 2;
|
|
}
|
|
|
|
int _moo_edit_extend_selection (MooEdit *edit,
|
|
MooEditSelectionType type,
|
|
GtkTextIter *start,
|
|
GtkTextIter *end)
|
|
{
|
|
int order = gtk_text_iter_compare (start, end);
|
|
if (type == MOO_EDIT_SELECT_CHARS) {
|
|
return order;
|
|
}
|
|
else if (type == MOO_EDIT_SELECT_WORDS) {
|
|
int ch_class;
|
|
|
|
if (!order && edit->priv->double_click_selects_brackets) {
|
|
GtkTextIter rstart = *start;
|
|
if (moo_edit_at_bracket (get_buf (edit), &rstart) &&
|
|
!(order == 1 && gtk_text_iter_compare (&rstart, start) == -1)) /* this means (...)| */
|
|
{
|
|
GtkTextIter rend = rstart;
|
|
if (moo_edit_find_matching_bracket (get_buf (edit), &rend) ==
|
|
MOO_EDIT_BRACKET_MATCH_CORRECT)
|
|
{
|
|
if (gtk_text_iter_compare (&rstart, &rend) > 0) { /* <rend>( <rstart>) */
|
|
if (edit->priv->double_click_selects_inside)
|
|
gtk_text_iter_forward_char (&rend);
|
|
else
|
|
gtk_text_iter_forward_char (&rstart);
|
|
}
|
|
else { /* <rstart>( <rend>) */
|
|
if (edit->priv->double_click_selects_inside)
|
|
gtk_text_iter_forward_char (&rstart);
|
|
else
|
|
gtk_text_iter_forward_char (&rend);
|
|
}
|
|
*start = rstart;
|
|
*end = rend;
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (order > 0) {
|
|
GtkTextIter *tmp = start;
|
|
start = end; end = tmp;
|
|
}
|
|
ch_class = char_class (end);
|
|
while (!gtk_text_iter_ends_line (end) &&
|
|
char_class (end) == ch_class)
|
|
{
|
|
gtk_text_iter_forward_char (end);
|
|
}
|
|
ch_class = char_class (start);
|
|
while (!gtk_text_iter_starts_line (start) &&
|
|
char_class (start) == ch_class)
|
|
{
|
|
gtk_text_iter_backward_char (start);
|
|
}
|
|
if (char_class (start) != ch_class)
|
|
gtk_text_iter_forward_char (start);
|
|
return gtk_text_iter_compare (start, end);
|
|
}
|
|
else if (type == MOO_EDIT_SELECT_LINES) {
|
|
if (order > 0) {
|
|
GtkTextIter *tmp = start;
|
|
start = end; end = tmp;
|
|
}
|
|
gtk_text_iter_set_line_offset (start, 0);
|
|
gtk_text_iter_forward_line (end);
|
|
return gtk_text_iter_compare (start, end);
|
|
}
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
|
|
static void start_drag_scroll (MooEdit *edit)
|
|
{
|
|
if (!edit->priv->drag_scroll_timeout)
|
|
edit->priv->drag_scroll_timeout =
|
|
g_timeout_add (SCROLL_TIMEOUT,
|
|
(GSourceFunc)drag_scroll_timeout_func,
|
|
edit);
|
|
drag_scroll_timeout_func (edit);
|
|
}
|
|
|
|
|
|
static void stop_drag_scroll (MooEdit *edit)
|
|
{
|
|
if (edit->priv->drag_scroll_timeout)
|
|
g_source_remove (edit->priv->drag_scroll_timeout);
|
|
edit->priv->drag_scroll_timeout = 0;
|
|
}
|
|
|
|
|
|
static gboolean drag_scroll_timeout_func (MooEdit *edit)
|
|
{
|
|
GtkTextView *text_view;
|
|
int x, y, px, py;
|
|
GtkTextIter iter;
|
|
GtkTextIter start;
|
|
MooEditSelectionType t;
|
|
GtkTextBuffer *buffer;
|
|
|
|
g_assert (edit->priv->drag_type == MOO_EDIT_DRAG_SELECT);
|
|
|
|
text_view = GTK_TEXT_VIEW (edit);
|
|
|
|
gdk_window_get_pointer (gtk_text_view_get_window (text_view, GTK_TEXT_WINDOW_TEXT),
|
|
&px, &py, NULL);
|
|
gtk_text_view_window_to_buffer_coords (text_view, GTK_TEXT_WINDOW_TEXT,
|
|
px, py, &x, &y);
|
|
gtk_text_view_get_iter_at_location (text_view, &iter, x, y);
|
|
|
|
buffer = gtk_text_view_get_buffer (text_view);
|
|
|
|
gtk_text_view_get_iter_at_location (text_view, &start,
|
|
edit->priv->drag_start_x,
|
|
edit->priv->drag_start_y);
|
|
|
|
if (edit->priv->drag_button == GDK_BUTTON_PRESS) t = MOO_EDIT_SELECT_CHARS;
|
|
else if (edit->priv->drag_button == GDK_2BUTTON_PRESS) t = MOO_EDIT_SELECT_WORDS;
|
|
else t = MOO_EDIT_SELECT_LINES;
|
|
|
|
if (extend_selection (edit, t, &start, &iter))
|
|
gtk_text_buffer_select_range (buffer, &iter, &start);
|
|
else
|
|
gtk_text_buffer_place_cursor (buffer, &iter);
|
|
gtk_text_view_scroll_mark_onscreen (text_view,
|
|
gtk_text_buffer_get_insert (buffer));
|
|
return TRUE;
|
|
}
|